Only one of the digital input connectors is used for input at a time.
The selection is automatic, depending on which input is active. If your
device has several different digital interfaces, and you want to test
them all, connect and test each one individually.
When the XLR connector is used for input, the BNC input connector
becomes a monitor output. It can be connected to an external
oscilloscope for monitoring of the XLR input signal.
The digital generator sends signals to all the digital output connectors
simultaneously. There is no way to disable one output while enabling
another.
Reference Input
The Reference Input provides an additional input to the digital
analyzer. It can be used for synchronizing the digital generator to an
external source (or ‘house sync’), or for calculation of delay between
two digital signal sources.
The Digital Reference Input is a balanced XLR connection. It accepts
a standard AES/EBU signal. The data on this connector is ignored -
only the synchronization information is used by the ATS-1 Dual
Domain.
If you have an unbalanced signal source to be used as a reference,
apply it to the Reference Input by connecting either pin 2 or pin 3 to
the signal conductor and the other to ground. No changes need to be
made on the instrument’s front panel to support unbalanced reference
inputs.
Synchronization of the digital generator to an external source is
controlled by the Generator Only panel in Digital Rate Generator
Control Mode. See page 3-17.
Calculation of delay between the external reference and the digital
input is accomplished using the DIGITAL I/O measurement function.
See page 4-42.
3 Operation
Generator Output and Analyzer Input connectors Operational Overview
3-36 ATS-1 Dual Domain User's Manual
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